Acidified (K\_2Cr\_2O\_7 ) solution turns green when (Na\_2S... | Chemistry | SolveeIt

Acidified $K_2Cr_2O_7$ solution turns green when $Na_2SO_3$ is added to it. This is due to the formation of

$CrO^{2-}_4$

$Cr_2(SO_3)_3$

$CrSO_4$

$Cr_2(SO_4)_3$

Answer

$Cr_2(SO_4)_3$

Explanation

$K _{2} Cr _{2} O _{7}+3 Na _{2} SO _{3}+4 H _{2} SO _{4} \longrightarrow 3 Na _{2} SO _{4}+ K _{2} SO _{4}+ Cr _{2}\left( SO _{4}\right)_{3}$

Chemistry Question on d -and f -Block Elements